Air-hose coupling.



Patented Nov. 350, 190g..

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etc., and the hose UNITED sTATEs IEBEDIE'BIIGK ROCK, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF T0 EDWARD A. FIELD, OF DETROIT, MICHIGAN.'

AIR-HOSE y i Specification of Letters Eatent. i

coUrLrNe.

Application led July 9, 1908. Serial No. 442,689.

To all 'whom 'it mafyllconcem:

Be -it known that I, FREDERICK .W. `Roon, a citizen of the United .'States, residing at Detroit, in the county of Wayne, State of Mlchigan, have invented certain new and useful Improvements inAir-Hose Couplings and I'do declare the following tobe a full, clear, and exact description ofthe invention, such as .will enable others skilled in the artf to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the gures of reference marked thereon, which form a part of this specification.

This invention 4relates to air hose' couplings, and consists in the construction and arrangement of parts hereinafter more fully set forth and claimed.

The object of the invention is to provide simple and efficient means for connecting an au' ose to and disconnecting said hose from. t`e supplyv pipe in compressed air systems, thparrangementbeing suchas to enable a hose to be quickly coupled to 'said supply pipe and readily uncoupled therefrom 1n a manner to obviate leakage of air when a cou ling is made. i

T e mvention further contemplates provision forobviating 'injury to the operator when removing the coupling member of the hose from the socket of the litting connected with the supply pipe by the blowing out of said coupling member due to the expansive force of the air under pressure in said hose, said provisionconsisting of a vent opening which permits theescape of the compressed air contained in thehose as soon as the clamp is released that holdssaid coupling member in position andprior totheremo'val of said clam to permit of the retraction of said mem er.v l

It isa common practice-where,compressedan' 1s employed 1n factories to runA a ma1n supply pipe to which-certain fittings are attached adapted to receive a couplingmemb'er on the air hose, the compressed air bein employed to drive hammers, chippers, rills, the operator being,ir obliged to move i from place to placev sothat meansv for facilitating the coupling ofthe air hose to the source of supply and the uncoupling of said hose therefrom is essential to obviate loss of time, and'it is further essential that the coupling means `be of such -acharacter as to prevent a leakage of air combined with the element of safety to the operator when disconnecting the coupling parts.

The above mentioned requisites are comprised in the structure shown in the accompanying drawings, in which Figu-rc 1 is a side elevation of; the coupling parts made in accordance with my invention. F ig. 2 is a top plan view of Fig. 1. i Fig. 3 is a central longitudinal section as on line 3 3 of Fig. 2.

Referring to the characters of reference, 1 designates a fitting or coupling member Shaving at one end a threaded aperture for connection with a pipe 2 which leads from air under pressure. Formed integral with and projecting from the coupling member 1 is a valve case 3 which is preferably cylindrical in form and is closed by a threaded cap 4. lVithin the case isa valve chamber 5 having a central opening G at the bottom communicating with the bore 7 of the body of. the coupling member 1. Surrounding said opening .6 is an annular valve seat 8. Crossing the interior of the coupling member 1 is a transversepartition 9 which separates the bore or. intake opening 7 `from the educt chamber 10 except through the communicating opening 6. Threaded in the cap fl is a valve stem 11 adapted to be turned by a hand Wheel 12. The lower end of the stem 11- is swiveled in a valve 13 having an upper washer 14 and a` lower washer 15 confined on opposite sides of the valve disk 16.- At the 'forward end of the fitting or coupling member 1 is a cylindrical part 17 ha"r ing a socket therein adapted to receive the projecting tubular end portion 18 of the coupling elbow 19, the opposite end of which is threaded, as at 20, for attachment'to an air hose, not shown. AFormed centrally through the bottoni 21 of the cylindrical part` 17 is an air educt port 22 which communicates'with the educt chamber 1'0.

, Projecting laterally fromopposite sides of the cylindrical part 17 of the coupling member- 1 are the trunnions 23. Pivotally mounted at its free ends upon said trunnions is a vU-shaped clamping yoke 24 adapted to elbow is'inserted in `said socket part, as .showin Asaid yoke at the outer or loop end the reservoir, not shown, or other source of` embrace the coupling elbow 19 when `saidthereof, carrying a screw 25 which is threadvalve 13 is then opened by -ister with the port ed therein and whose inner end is adapted to bear against a per endicular shoulder 26 formed on the coup ing elbow 19. Projecting outwardly from the base of said shoulder is a lug 27 adapted to be engaged by the inner end of vthe screw 25 to prevent the yoke dropping down too far when swung into clamping position. Fixed to the outer end of the screw 25 is an actuating handle 28. Within the socket of the cylindrical part 17 and lying upon or against the annular bottom portion 21 of said socket which forms a circular seat, is a compressible washer 29 having a central aperture to reg- 22. rllhe tubular end portion 18 of the coupling elbow which is adapted to lie within the socket of the cylindricalpart 17 is adapted to engage said washer and by means of the clamping yoke and screw is forcibly held thereagainstwhen the parts are coupled to effect a continuit-y of the air passage way through the coupling member 1 andthe elbow 19 to the air hose. By means of said washer all escape of air between the socket part and the coupling elbow is obviated, enabling the tubular end portion of the coupling elbow to be vloosely fitted within the socket part to facilitate its insertion into said part and withdrawal therefrom.

The operation of this improved air hose coupling may be described as follows The valve 13 remains normally closed, thereby cutting oit' the air from the cylindrical socket part 17 of the coupling member. When it is desired to connectI the air hose with said coupling member,`tne tubular end portion 18 of the coupling elbow 19 is inserted in the socket of the part 17 and secured therein by swinging the yoke downwardly so as to cause the inner end of the screw 25 carried thereby to engage the shoulder 26 on said elbow, whenl by turning .said screw through the medium of the handle 28, the inner end of the tubular portion of said elbow may be forced tightly against the washer 29, thereby edecting an air tight connection. between the coupling ,.part. f The a manipulation of the screw 11, said valve being raised until the upper washer 14 thereof seatsy against the shoulder 30 formed by the depending annulaizflange 31 of the capa whereby all escape of air through the valve chamber is prevented and the necessity of A pa-cking around the stem 11 of the valve is obviated. The opening vof the valve 13 permits air to How through the coupling member 1 vand through the elbow 19- into the air hose for such use as may be desired. When it is desired to disconnect said parts the valve 13 is closed by screwngit downwardly onto its seat 8, thereby `cutting 0E the air ressure from the coupling elbow. f The .c amping screw 25 is then unscrewed to release the allowing said air to escape before disengaging the yoke from said elbow. To afford an escape for the air contained in the air hose, vent openings 32 are formed throu h the wall of the cylindrical socket part 17 in the planeof the face of the washer 29 so that as soon as the screw 25 is unscrewcd preparatory to raising the clamping yoke 24, the pressure of the air within the hose will force the elbow outwardly and carry the inner end of the tubular end portion 18 thereof from its seat against the washer 29, thereby affording a passage for the retained air to and out the vent openings 32, thereby relieving the pressure within the hose and obviating the blowing out of the coupling elbow 19When the yoke is raised to permit of the withdrawal ofsaid elbow. Instead of providing the vent openings 32, the tubuf lar member 18 may be made to fit so loosely within the socket member 17 as to aiiord a vent for the air contained in the air hose; however, the vent openings shown are preferred for the reason that they -aord a more direct escape for the air. p

Having thus fully set forth my invention, what l yclaim as new and desire to secure by Letters Patent, is

1. In an air hose coupling, the combination of a socket member having a controlling valve therein, a coupling elbow adapted to be connected with an air hose and having a tubular part adapted to enter the socket of said socket melnber, a washer within said socket adapted to be engaged by the tubulaiend of said elbow, meansfor. clamping the coupling elbow to the socket member and forcing its tubular end against said washer, one of the coupling parts having a vent aperture which communicates with the air passage through said parts only when the tubular part of the coupling elbow is out of forcible engagement with said washer.

2. vIn an air hose coupling, the combination of a lsocket member having a controlling valve therein, a washer at the inner terminal of the socket of-said member, a coupling elbow adapted to be' connected with an air hose and having a tubular part adapted to make connection with the socket member to establish a continuity of the air passage way through said parts vand to bear against the washer in the soket of said member, means for clamping the coupling parts together, and avent opening in the socket member between snid'washer and the outer end of CJI said socket to prevent forcible ejection of the coupling elbow upon the release of said clamping means.

3. In an air hose coupling, the combination of a socket member having'a controlling valve therein, a washer in said socket, a coupling elbow adapted to be connected with 1 an air hose and having tubular part adapted to make connection with the socket mem'- ber to establish a continuity of the air passage way through said parts and to bear against the washer in said socket, a yoke pivoted to' the socket member and adapted to embrace the elbow member, and a screw carried by said yoke adapted to engage tlie elbow member.

4. In anair hose coupling, the combination of a coupling lnember haring a con-y trolling valve therein and provided with a socket, the wall of saidrsocket having a vent, opening therethrough, a second coupling member adapted forattachme'nt to an air hose and having a part for entrance into the socket ofthe irst mentioned member', and means for detachabl;1 clamping the coupling members together.

5. In an air hose coupling, the combination of a coupling member having a controlling valve therein, and having a socket provided with a ventopening through the wall thereof, a. washer Within said socket, a coupling member adapted for attachment to an air hose *and having a tubular part for entrance into said socket, a yoke pivoted to the irst mentioned coupling member and adapted to embrace the coupling member adapted for connection with an air hose, and a screw carried by said yoke to engage the last mentioned coupling member.

` 6. In an air hose coupling, the combination of a coupling member haring a. controlling ralre therein, a second removable coupling member adapted for connection with an air hose and haring a part for connect-ion with said first mentioned member, means for detachably clamping the coupling members together to eiect a continuit of the air passage way therethrough, one ot' the coupling members haring a normalhvopen vent aperture, and means for closing said aperture when the couplingl partsare in Jforcible engagement. In testimony whereof, I sign this specith cation in the-presence of two witnesses.

- FREDERICK W. ROCK.

Witnesses:

O. B. BAENZIGER, I. G. HOWLETT. 

